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Rokinon 14mm f/2.8 vs EF-S 15-85mm f/3.5-5.6

Started Aug 12, 2013 | Discussions thread
NancyP Veteran Member • Posts: 6,608
Re: Rokinon 14mm f/2.8 vs EF-S 15-85mm f/3.5-5.6

A lot of people blend multiple shots to collect more photons without running into star trails. Are you at a dark sky area? Do you manual focus on 10x Live view (pick a very bright star)? I don't think that the difference of 2/3 stop is really important here. You can get a decent start on the 15-85 wide open, and when you want something wider, go for the SamBowRokinon 8mm fisheye, which is also f/3.5. I do have the Samyang 14mm f/2.8, it is very good at 2.8 for APSC, but really should be used at f/4 for maximum FF corner sharpness and minimum coma. Tip: if you face south, you get more trailing than if you face north. You might find that oval stars are fine if you are wanting the general effect and not 100% magnification.

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NancyP

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